Process for the production of solid alcohol structure soaps



1 Patented Sept. 28,1926.

' soap likeztoilet'soap or' of paste *use is :fill'ed in' tubes.

v n6 sawing. Application med repeaters; 924,

is stuck into them UNITED TA The solid alcohol soaps on the either in the shape of a handy tablet of-solid Thesefsoaps washing and disinfecting purposesjand "are well adapted, especiallywhen in pasty state, to form carriers for medicinal substances. The solid soap cakes makea homogeneous jelly-like impression and resemble still the ordinary water containing soap. 7 They still possess considerable solidity and a comparatively high melting point above the Warmth of the body. To the solidity corresponds however a certain brittleness; the soaps break into round lumps when a knife or even under a strong 1 pressure' The alcohol is not yet sufliciently bound in the same and it can be easily removed. by pressure or suction. The pasty soaps are of limited durability as, probably owing to the pressure exerted at the prepar ation, a separation of theliquid and solid constituents takes place after a comparatively short time. While for instance directly after the preparation of the paste from the soap and after'the filling into tubes an absolutely uniform jet can be pressed out of the tubes. After some weeks it will be seen that, a liquid will flow out of the tube, besides the paste, said paste consisting of alcohol or liquid soap-alcohol.

Experiments have shown that the products made in the apparatus of known type preserve the characteristics mentioned however the proportions of the constituents may be varied. If however soaps which have been desiccated to about 5% alcohol in a proportion water and 96% ethyl in which they are no longer capable to be dissolved in the commonly used apparatus e. g. in open vessels,

are heated in closed vessels, for instance in an autoclave, at increased atmospheric pressure and. at a temperature above the boiling point of the alcohol, products are obtained which, as regards physical properties and the effect resulting from the same, differ considerably from the production hitherto obtained.

The products from the mixtures mentioned of desiccated soap and alcohol of high percentage which must be heatedi gh closed vessels in order thatthey are ableto form a solution, can no longer be moulded, as the commonly used soaps do, by being poured into open molds in the free air as an alcohol soap of 25 %fNa-laurate, 5% Na-stearate, 5%

'rss PAT Se e for of alcohol of news an rnonucrIoit-o'r SOLID :ALCOVI-VIOL STRUCTURE soars.

Serial No. 754,162, and. in Germany e ber 1 2.1923.

Na-passed; s55 7; al-f EN Ti {or v.

coho'l will for instance meltin the usual'meltinga'; poinljffapparatusi' in? a capillary tube closed by' inelting, 'without:fail at 100 to 110? CL, that is considerable" above the boil,- ing-poin't'of-alcoho In solidified condition the products mentioned solidifyalready at a comparatively high temperature. They form then an opaque streaky threa'dy mass, similar to fungus flesh,.which is not in the least like the hitherto known structureless soap jellies. Observed under the microscope the new substance looks generally as conslsting of an aggregate of fine needle-like or granulous elements which are intertwined manner.

In the new product the alcohol is incorporated in the soap so well that the separationof the same from the paste produced under pressure does no longer interfere with the usefulness and the melting point is higher and therefore more favorable than in the soaps on the market. The solid tablet does no longerdecompose into round lumps even under strong pressure and it can be worked with the knife like ordinary soap. Ifthe soap chips are dried in the air they preserve the same st-reaky. character while the residues of soap from the alcohol soap prepared accordin to the hitherto used methods are after the evaporization of the alcohol which they contain like a more or less aged silicic acid jelly.

The process can be carried out as follows 45 parts of chipped soaps, desiccated to about 5%, are heated together with 55 parts 96 volume percent in an autoclave at a temperature of 120 C. and at a pressure of 6 atms. for 1 hours. After cooling a very hard alcohol-structure-soap is obtained the'melting point of which is about 90 C., said soap giving up under the suction pump only very little alcohol even when being'compressed and it is capable of being treated with a knife without disintegrating. 10 gr. of a paste composed of 26.3% desiccated soap and 73.7% alcohol have for instance, been exposed at a reduced pressg're of 50 mm. in the suction bottle for 10 minutes to the action of the suction pump. 1.5 0. cm. cube' of alcohol were sucked off or about 19% of the alcohol contained in the soap.

By mixing the micro produced structure.- alcohol-soap with the hitherto used strucin a felt-like substances are a careless jelly soap reparations in pasty form can be obtaine which are referably designed for medical purposes, T ese soaps soften when rubbed into the skin and penetrate also into deeper layers of the skin as the alcohol contained in the soaps, besides its disinfecting property dissolves the fatty, resinous and slimy substances which choke up the pores of the skin and makes these ores free to admit the alcohol soap. This is" true of all kinds of mixtures of alcohol soaps however much the proportion of the sebacic salts of the soap may vary in the fundamental soa s, and also when medicinal d ded to the alcohol soaps. I claim strength, comprising the steps that a mixture of about parts by weight of soap and about parts by Weight of alcohol is heated in'a closed vessel at a temperature of C. and undera pressure of 6 atms, and in continuing the heating under pressure for one hour and one-half so that the product obtained contains the total quantity of alcohol of the mixture.

In testimony whereof I affix my signature.

PR. RICHARD F ALCK. 

